Error correction in digital television signals

Details Error correction in digital television signals Error correction in digital television signals

1983-08-17

1986-03-18

McElheny, Jr., Donald

Facsimile and static presentation processing

Facsimile

Recording apparatus

360 103, 371 40, H04N 5782

Patent

active

045772371

ABSTRACT:
A method of correcting errors in a digital television signal comprises forming the data words of the television signal into correction units each of which comprises a plurality of the data words and a parity word formed therefrom, and recording and subsequently reproducing on a digital video tape recorder the correction units. On slow motion reproduction from the digital video tape recorder a syndrome generator derives a syndrome from the data words and the respective parity word of each reproduced correction unit. An error counter counts the number of valid words in each reproduced correction unit. If this count is one less than the total number of words in the correction unit, the syndrome is used to correct the data word which is in error, and if the count is equal to the total number of words in the reproduced correction unit and the syndrome is not equal to zero, each of the data words in the reproduced correction unit is flagged as being in error.

REFERENCES:
patent: 4293879 (1981-10-01), Heitmann et al.
patent: 4451920 (1984-05-01), Hoshimi et al.
patent: 4453250 (1984-06-01), Hoshimi et al.
patent: 4467373 (1984-08-01), Taylor et al.

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